Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Taxatio - Tax Calculator
demystify your taxes! taxatio is an income tax calculator made specifically for self-employed sole proprietors based in the us
$6.00 · In-app purchases
PRICE
$6.00
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
7 ratings · Top 5%
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Taxatio - Tax Calculator: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Simplify the interface with guided inputs and explanations.
Assumption to check: Users find tax calculators complex and hard to use.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate local tax laws and updates for accuracy.
Assumption to check: Users want more accurate estimates based on local regulations.
Validate with people who use this workflow before building.
Hypothesis 3
Offer a one-time purchase option without ads.
Assumption to check: Some users dislike ads or upsells in apps.
Validate with people who use this workflow before building.
Hypothesis 4
Provide a basic mode for new users and an advanced mode for experienced users.
Assumption to check: Users feel overwhelmed by too many options.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
demystify your taxes! taxatio is an income tax calculator made specifically for self-employed sole proprietors based in the us. it is intended for freelancers, independent contractors, and consultants with common tax scenarios. taxatio helps you estimate your full annual tax burden and offers detailed breakdowns that explain what you owe. features: • estimate your federal and state income taxes • estimate your self-employment taxes • estimate your quarterly taxes • see your tax bracket and effective tax rates • get detailed breakdowns to better understand what you owe and why • see helpful tips that explain each part of your taxes • plan your retirement contributions • automatically calculate your maximum retirement contributions • select the standard deduction or input itemized deductions • compare tax scenarios and plan ahead • set reminders for quarterly estimated taxes • dark mode • universal app for iphone, ipad, and mac note: all calculations are estimates and your actual taxes may vary. taxatio does not provide tax or financial advice. please consult your accountant or financial advisor.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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BUILD KIT DIFFICULTY
Starter
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
